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  1. #11

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    Finally was able to replace the upstream sensors with the AC/Delco parts ... made a quick test drive up a grade today (same grade I drove yesterday which threw the errors again), no errors. Hopefully we're winning the battle now. The real test will be when I have to pull a trailer again and/or when the weather gets hot again. Thanks for the help, hopefully I won't be back asking for more help on the same issue!

  2. #12

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    Still had the same problem on a recent trip, going up a grade, this time not pulling anything behind me. Have the AC/Delco O2 sensors in, too. Starting to run out of patience, ideas, and $$$.

  3. #13

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    What about your ECM? I know, expensive. I am really leaning towards a wiring issue. Possibly the pins or inside the connector. Possible it could be further back up the harness.

  4. #14

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    Quote Originally Posted by boycbronco View Post
    Still had the same problem on a recent trip, going up a grade, this time not pulling anything behind me. Have the AC/Delco O2 sensors in, too. Starting to run out of patience, ideas, and $$$.
    Boycbronco, Did you ever figure out what's going on? I'm having the same issues...

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